Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 8
1.4.
Earth Ground Point
A connection point has been provided for an Earth ground point. This critical
connection always should be made first and should never be overlooked.
Any time a sensor cable is attached to the terminal strip, exposure to dangerous
electrical surges is possible. There are many possible causes, but the most
common source of a surge is created from nearby lightning strikes. Protection is
afforded only when the earth ground is properly connected to a qualified ground
source.
Failure to properly connect the Earth ground point will lead to failures in the
field due to surges.
To install a proper ground connection point:
1.
Use a copper ground rod driven into the ground at least 6 feet.
2.
Attach a very heavy gauge (#4 Solid Copper) wire between the rod and the X-
Link Earth ground point. The connection point can accept up to a 4 gauge
solid copper wire. If a heavier gauge copper wire is used to connect to the
ground rod, a reducer may be necessary to connect to the terminal on X-Link.
Firmly secure the screw on the ground point firmly on the copper wire. Do not
rely on AC power ground connections as they are not always properly
grounded and may introduce other surges.
1.5.
Input Protection
X-Link features gas tube protection on all sensor inputs.
1.6.
Terminal Strips
The two terminal strips built into X-Link provide the connections for battery,
solar panel, sensors, and outputs. The table below describes the purpose of each
connection. Additional information on using the connections follows.
